JPS60131720A - Slide contact unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding contact device, and particularly to improvements in the materials of the brush and commutator or slip ring that constitute the same.

Conventional sliding contact devices have P d 3G ~ 50% by weight, A
A brush made of an alloy material containing g2O~40% by weight and Cu2Q~40% by weight, Ag-C, d 0.5~! 5
! □It is also made of a combination of a concrete or a slip ring made of an alloy material of 5%. ``By the way, the brush of this sliding contact device □ softens and adheres during one movement with the commutator or slip ring, so abrasion powder easily forms and the contact resistance becomes unstable. .

On the other hand, commutator □ or pickpocket ring is Ag-
It was composed of an alloy material of 5 to 1!53i% by weight, and had high stickiness and poor abrasion resistance when sliding with a brush. '' □ The present invention has been made to eliminate these drawbacks.

Therefore, it is an object of the present invention to provide a sliding contact device in which the abrasion resistance and contact resistance characteristics of the brush are improved, and the abrasion resistance of the commutator or slip ring is improved.

・ The sliding contact device of the present invention has a Pd of 30 to 50% by weight.

Cr, Mg, and Z are added to an alloy material containing 20 to 40% by weight of A g and 40% by weight of Cu2G without changing the composition ratio.
r.

At least one type of P is added in an amount of 0.5 to 10% by weight. A brush made of alloy material, A g :, C1
u 3□~12% by weight or Ag-Cu3~12% by weight-
It is combined with a commutator or slip ring made of an alloy material containing 5% by weight of Cd or less.
□ ・ Cr is added to the alloy material that makes up the brush.

A part of Mg, Zr, and P may be replaced with Fe group elements (Fe, Co, Ni) in a range of 0.01 to 0.5% by weight.

As a result of the sliding contact device of the present invention, the brush can be
50% by weight, Ag2O~40% by weight, Cu 20~40
Add 7 to the =xm ratio to the weight% alloy material without difference C
The reason why the alloy material is made of an alloy material containing 0.5 to 10% by weight of at least one of r, Mg, Zr, and P is that
0.5% by weight to prevent softening during sliding due to precipitates in order to improve the adhesion resistance of the d-Ag-Cu alloy material.
If it is less than 10% by weight, the effect cannot be exhibited, and if it exceeds 10% by weight, the amount of oxides generated increases, the contact resistance becomes high, and it becomes unstable.

Commutator or slip ring, Ag-Cu3~1
2% by weight or 3-12% by weight of Ag-Cu-5% by weight of Cd
The reason for using the following alloy material is to suppress adhesion during sliding with the brush and improve wear resistance, and this effect cannot be obtained if the Cu content is less than 3% by weight. ,,1
When the Cd content exceeds 2% by weight, the amount of oxide generated during sliding becomes too large and the contact resistance becomes high and stable, and when the Cd content exceeds 5% by weight, this becomes oxidized Cd. , contact resistance increases and wear resistance deteriorates. Therefore, the content of C'u should be 3 to 12% by weight, and the content of Cd should not exceed 5% by weight.

Therefore, Cr added to the alloy material constituting the brush,
Mg, Zr, P(7) part, 0.01 to 0.5% by weight
When substituted with Fe group elements (Fe, Go, Ni) in the range of No effect appears, and even if it exceeds 0.5% by weight, no further effects can be obtained. , Next, the sliding contact device according to the present invention! ? A specific example and a conventional example will be described.

Wires with a diameter of 0.0 mm are made of the alloy materials of the embodiments and conventional examples having the compositions shown in the left column of Table 1 below. Cut the brush wires of 'l and *m into lengths, β cranes, put them in parallel, and weld one end to a base material with a width of 10 mm, length of 13 m, and thickness of 0.21.
Then, I made a brush with a 2R arc-shaped contact part on the other end. - Example and Conventional Example of the component composition shown in the right column of Table 1 in Subsection 1. A slip ring with a diameter of 501 cm was made by punching out a 0.5-thick tuna plate made of the alloy material of the example.

Therefore, a sliding contact device was made by combining these brushes and slip rings, and a sliding test was conducted under the following test conditions by bringing each brush into contact with the slip ring and rotating the slip ring in forward and reverse directions. When the wear amount and contact resistance of the slip ring were measured, the results shown in Table 2 below were obtained.・Test conditions Current: O, 6A Voltage: 12V Load: Resistive load, 5/rotation %: 11000 rpm Peripheral speed, 1 degree: 120~. 130m, /min
Contact force: 100も.

, sliding time near h (blank below) Table 2 As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 5 are the same as those of the sliding contacts of Conventional Examples 1 and 2, respectively. It can be seen that the amount of wear is significantly lower than that of brushes and slip rings, and the contact resistance is lower and more stable. This is because the alloy material constituting the brush of the sliding contact devices of Examples 1 to 5 is prevented from softening during sliding by adding at least one of Cr, Mg, Zr, and P.
This is because the adhesion resistance is improved, and in particular, the amount of wear of the brush of the sliding contact device of Example 5 is even less than that of the sliding contact device of other examples. This is because Fe group elements are added to the material, and its crystal grains are finely dispersed, improving wear resistance. This is due to the fact that the constituent alloy material, Cu, suppresses the increase in tackiness during sliding and improves wear resistance.

As detailed above, the sliding contact device of the present invention has significantly superior wear resistance of the brush and commutator or slip ring compared to conventional sliding contact devices, and generates extremely little wear powder (and Since the resistance is also lower and more stable, it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) P d 30 to 50 fE setting %, Ag2O to 40
An alloy material c"r made by adding 0.5 to 10 weight % of at least one of Cr + Mg, ZR, and P to an alloy material containing 1 weight % of Cu2O to 40i by weight without changing the composition ratio. A sliding contact device comprising the above-mentioned brush and a commutator or slip ring formed of an alloy material of 3 to 12% Ag-Cu or 3 to 12% Cu-5g% by weight. 2) Cr added to the alloy material constituting the brush. A patent claim characterized in that a part of Mg, Zr, and P is replaced with an Fe group element in a range of 0.01 to 0.5% by weight. The sliding contact device according to item 1.